If Sumi's patbingsu is what all patbingsu tastes like, I don't know why regular shave ice (or even filipino halo-halo) still exists. I'm normally not a huge fan of red bean desserts--if you've never had red bean, consider trying it in bread before trying a whole red bean bingsu--but this was amazing. And you can easily share this with 3-4 people. I'll be going back to try the other flavors for sure.
Tip from Sumi: Bingsu is meant to be mixed up completely so that you don't end up with plain shave ice at the bottom.
The bubble tea is nothing special. They use powdered flavoring (as most places do) and the boba is a bit on the hard/chewy side. You can also tell they don't soak their boba in sweet syrup which can be good or bad depending on your preference--it's not that noticeable unless you're really into bubble tea. Now if they made bubble tea smoothies out of the red bean or matcha ice cream they use in the bingsu, that would be good..